30a blows but only if running?

cmross13 · July 24, 2021, 05:14:19 PM

Washed the bikes last night, forgot to dry with leaf blower. Woke up today, sobered up, attempted to moved bikes back into garage. 2007 S4RS fired right up, idled for a few seconds, lost all power and shut off. 30A fuse replaced, did it again. Replaced a second time, this time just turned the key on and ignition on, didn't blow. Started it up, blew a few seconds later.

I don't feel like tearing into this harness, so I thought I'd ask here first. Any suggestions?

cmross13 · July 25, 2021, 12:49:56 PM

update. blew again at some point overnight with ignition off

ducpainter · July 25, 2021, 12:58:32 PM

Is this the 30 amp maxi fuse for the alternator circuit that we're talking about?

cmross13 · July 25, 2021, 01:01:37 PM

im not sure what circuit its for as i dont have a wiring diagram i just know its on the "passenger/curb/right" side of the battery(opposite the terminals) and is not in a fuse panel just on a lug attached to a bracket. was the first thing i saw when i lifted the tank so was the first thing i checked lol

Howie · July 25, 2021, 02:06:45 PM

Serious short! Most likely between the fuse and battery or terminal 3 on the ignition switch.

ducpainter · July 25, 2021, 02:27:16 PM

That fuse is for the alternator, as well as the items howie mentioned.

You need to get a wiring diagram. Available from ducati.com, or in the back of your owners manual.

koko64 · July 25, 2021, 03:42:32 PM

Glad that fuse is doing its job, if you replace it, disconnect the battery, especially overnight.
My feeling is that you get the bike to a bike tech or auto electrician.

Heath · July 28, 2021, 05:05:54 PM

Blow out the bike and that fuse some more? That is the main fuse and it is not very water proof. Or possibly your RR just took a dump.

S4RS owners manual (4MB)

S4RS workshop manual (36 MB)

booger · July 29, 2021, 08:15:50 AM

Issues like this are why I never wash my bike in a traditional sense, just give it wipedowns with gentle cleaner in a spray bottle and keep the underside clean with diesel fuel. It's more of a time-consuming process and I'm always tempted to use the foam cannon and hose rinse it, but I'd really rather not have these problems so I suffer the inconvenience. I hate corroded fasteners as well.

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30a blows but only if running?